Anyone who is still suffering with MS Windows Vista may be interested in upgrading to Windows 8 Pro. Considering the frequent slowdown and hangs with Windows Vista, a $40 upgrade is reasonable.
After upgrading to Windows 8 Pro, an upgrade to turn on the Media Center features is no charge. "... you can add Windows Media Center for free through the “add features” option within Windows 8 Pro after your upgrade."
The upgrade pricing is available through January, 2013.
For those purchasing a new system with Windows 7, the upgrade will cost $15 after registering for the promotion.